Step-Down Voltage Regulator D24V3ALV - 2,5V - 7,5V 0,3A - Pololu 2101

Small Converter module pulse power. Input voltage 4.5 V to 42 V Adjustable output voltage range: 2.5 V to 7.5 V Maximum output current is 300 mA.

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Price 29,90 zł


  • Input voltage: 4.5 V to 42 V
  • Output voltage is adjustable from 2.5 V to 7.5 V
  • Maximum output current: 300 mA
  • The switching frequency is 500 kHz
  • Built-in protection (circuit breaker) for protection against too high power consumption and high temperature
  • Dimensions: 15,3 x 10,2 x 4 mm
  • Weight: 1g (without connectors)




Adjustable DC-DC Converter has a wide input voltage range from 4.5 V to 42 V is Characterized by an efficiency level of 80 %. The value of the output voltage is set using the potentiometer. Range: from 2.5 V to 7.5 V. output Voltage cannot exceed input voltage.




The module has four output:

  • VIN - the input voltage
  • GND - the ground,
  • VOUT - the output voltage,
  • SHDN - shutdown.




If SHDN appears low (below 0.3 V), the Converter shuts down and the quiescent current does not exceed 20 µa. To specify a high (above 2.3 V) re-activates the system. The output can be connected on a permanent basis to VIN or leave it off if the power-off mode will not be used.


Connectors respectively signed on the Board. Terminal pitch is 2.54 mm (goldpin connectors). The module can be mounted on the contact plate, to connect with wires or solder in a special printed circuit Board.


The output voltage is set using the potentiometer. Voltage higher than the input will not damage the system. Will appear large fluctuations. So it is not recommended setting the voltage higher than the input.



Oscylogram output voltage. VIN is 5V. VOUT is set above 5V.

The choice of the output voltage

Turning the potentiometer clockwise causes the increase of the output voltage.



A graph showing the relationship between pięciem on weekends and the position of the potentiometer for converters 4-25V and a 2.5 to 7.5 V.


Efficiency and output current

Efficiency is defined as the ratio of output power to input power (Power out)/(Power in). This is a very important parameter for portable energy sources (batteries and accumulators), which has a value of working time on one cycle charging. The dependence of the efficiency on the input voltage given in the diagrams below.





Hazardous voltage pulses

When connecting power to the module, can appear dangerous, eclectic short pulses of high amplitude (so-called pins), which can damage the system. Test company, Pololu, it follows that for voltages above 20V studs can have an amplitude in excess of 42 V. to protect against this undesirable phenomenon wlutowanie recommended capacitor value of at least 33 µf, as close as possible to the power pins of the Converter.


More detail on the website of the manufacturer.


  • Length 15 mm
  • Width 10 mm
  • Height 4 mm
  • Voltage to 4.5 V
  • Voltage from 42 V
  • Voltage output from 2.5 V
  • Output voltage to 7.5 V
  • Current 0.3 A
  • Stabilizer - Type2 switching
  • Stabilizer - Type step-down


Posting the payment for the order on our account on a business day up to 13:00 means sending the goods on the same day!


The time of payment depends on the hours of ELIXIR session of the sender's bank and the recipient of the transfer (more information on this subject, for example on the website


The table presents available forms of delivery in Poland


Carrier and

Bank wire

by cash


Poczta Polska

terms of service

9,90 PLN17,90 PLN1-3 days

Kurier GLS

terms of service

14,90 PLN22,90 PLN

1-2 days

Paczkomaty 24/7 

terms of service

12,90 PLN-1-3 days

If the amount to pay for products exceeds 500 PLN
Delivery is for free!


  • Free delivery of orders over 500 PLN does not apply to parcels addressed outside of Poland.
  • Free delivery does not apply when changing orders.
  • The delivery period is counted in working days from the date of dispatch of the order.